AVNRT Flashcards
1
Q
What percentage of patients present with AVNRT?
A
60%
2
Q
What is the drug of choice to terminate AVNRT?
A
Adenosine
3
Q
What are the characteristics of a slow pathway?
A
slow depolarization
fast repolarization
4
Q
What does an A-H jump beat imply?
A
antegrade conduction down alpha pathway
5
Q
How does the pulse travel in Typical AVNRT?
A
Antegrade down alpha
retrograde up beta
6
Q
How does a normal impulse travel through the AV node?
A
Antegrade down beta
retrograde up alpha
7
Q
Which pathway is the slow pathway?
A
Alpha
8
Q
Which pathway is the fast pathway?
A
Beta
9
Q
The AH interval for a jump beat
A
> 50 msec
10
Q
How is VA interval evaluated through stimulation?
A
right ventricular pacing
11
Q
What does the QRS complex look like in AVNRT?
A
narrow
12
Q
What would Atropine do to AV nodal conduction?
A
increase
